AP Statistics Inference Tests and Intervals

AP Statistics Inference Tests and Intervals

12th Grade

14 Qs

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AP Statistics Inference Tests and Intervals

AP Statistics Inference Tests and Intervals

Assessment

Quiz

Mathematics

12th Grade

Practice Problem

Hard

Created by

Anthony Clark

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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the margin of error of this sample?

0.28

0.14

0.342

0.684

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A random sample of 100 WHS students found that 53 of them were in possession of a pencil. What is the p-hat for this sample?

0.53

0.5

0.47

1

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The symbol for the sample proportion is __________.

Zc

E

q

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

To test a claim about a mean, when the population standard deviation is unknown we use:

z procedures

Pythagorean Theorem

t procedures

np > 10 and n(1-p) > 10

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A quality control inspector will measure the salt content (in milligrams) in a random sample of bags of potato chips from an hour of production. Which of the following would result in the smallest margin of error in estimating the mean salt content σ ?

90% confidence; n = 25 

90% confidence; n = 50 

95% confidence; n =25 

95% confidence; n =50 

n=100 at any confidence level 

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Scientists collect data on the blood cholesterol levels (milligrams per deciliter of blood) of a random sample of 25 laboratory rats. A 95% confidence interval for the mean blood cholesterol level μ is 80.2 to 89.8. Which of the following would cause the most worry about the validity of this interval?

There is a clear outlier in the data

A stemplot of the data shows a mild right skew

You do not know the population standard deviation σ

The population distribution is not exactly Normal.

None of these are a problem when using t-interval

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A random sample of 25 Ohio students had a mean ACT score of 21 with a standard deviation of 1.2.  Which of the following is the 95% confidence interval for the true average ACT score for Ohio students?

(20.53, 21.47)

(18.648, 23.352)

(20.505, 21.495)

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